Hi All, Can't find a clear answer, so I thought I'd ask here: we are about to start our first summer owning a lakeside camp, and one of our first changes will be to move the fire pit. The one there is a two-level ring of field stone with what looks like stone dust or other heavily compressed substance in the middle. We're planning on just moving the ring of rocks to another place but are concerned the heat from the fire will crack the pavers below. What is an inexpensive way to insulate the pavers below from the fire heat? Any other (low cost) suggestions? Thanks!